20647275

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{863}}^1$

素因数の和:916

約数の個数: 48

約数和(自身を含む): 38568960

約数和(自身を除く): 17921685

約数列:

[1, 3, 5, 11, 15, 25, 29, 33, 55, 75, 87, 145, 165, 275, 319, 435, 725, 825, 863, 957, 1595, 2175, 2589, 4315, 4785, 7975, 9493, 12945, 21575, 23925, 25027, 28479, 47465, 64725, 75081, 125135, 142395, 237325, 275297, 375405, 625675, 711975, 825891, 1376485, 1877025, 4129455, 6882425, 20647275]

約数ペア:

[(1, 20647275), (3, 6882425), (5, 4129455), (11, 1877025), (15, 1376485), (25, 825891), (29, 711975), (33, 625675), (55, 375405), (75, 275297), (87, 237325), (145, 142395), (165, 125135), (275, 75081), (319, 64725), (435, 47465), (725, 28479), (825, 25027), (863, 23925), (957, 21575), (1595, 12945), (2175, 9493), (2589, 7975), (4315, 4785)]